diff options
Diffstat (limited to 'plat/juno/aarch64/bl1_plat_helpers.S')
-rw-r--r-- | plat/juno/aarch64/bl1_plat_helpers.S | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/plat/juno/aarch64/bl1_plat_helpers.S b/plat/juno/aarch64/bl1_plat_helpers.S new file mode 100644 index 0000000..785aa15 --- /dev/null +++ b/plat/juno/aarch64/bl1_plat_helpers.S @@ -0,0 +1,125 @@ +/* + * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * Neither the name of ARM nor the names of its contributors may be used + * to endorse or promote products derived from this software without specific + * prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include <arch.h> +#include <asm_macros.S> +#include "../juno_def.h" + + .globl platform_get_entrypoint + .globl platform_cold_boot_init + .globl plat_secondary_cold_boot_setup + + + /* ----------------------------------------------------- + * void plat_secondary_cold_boot_setup (void); + * + * This function performs any platform specific actions + * needed for a secondary cpu after a cold reset e.g + * mark the cpu's presence, mechanism to place it in a + * holding pen etc. + * ----------------------------------------------------- + */ +func plat_secondary_cold_boot_setup + /* Juno todo: Implement secondary CPU cold boot setup on Juno */ +cb_panic: + b cb_panic + + + /* ----------------------------------------------------- + * void platform_get_entrypoint (unsigned int mpid); + * + * Main job of this routine is to distinguish between + * a cold and warm boot. + * On a cold boot the secondaries first wait for the + * platform to be initialized after which they are + * hotplugged in. The primary proceeds to perform the + * platform initialization. + * On a warm boot, each cpu jumps to the address in its + * mailbox. + * + * TODO: Not a good idea to save lr in a temp reg + * ----------------------------------------------------- + */ +func platform_get_entrypoint + mov x9, x30 // lr + bl platform_get_core_pos + ldr x1, =TRUSTED_MAILBOXES_BASE + lsl x0, x0, #TRUSTED_MAILBOX_SHIFT + ldr x0, [x1, x0] + ret x9 + + + /* ----------------------------------------------------- + * void platform_cold_boot_init (bl1_main function); + * + * Routine called only by the primary cpu after a cold + * boot to perform early platform initialization + * ----------------------------------------------------- + */ +func platform_cold_boot_init + mov x20, x0 + + /* --------------------------------------------- + * Give ourselves a small coherent stack to + * ease the pain of initializing the MMU and + * CCI in assembler + * --------------------------------------------- + */ + mrs x0, mpidr_el1 + bl platform_set_coherent_stack + + /* --------------------------------------------- + * Architectural init. can be generic e.g. + * enabling stack alignment and platform spec- + * ific e.g. MMU & page table setup as per the + * platform memory map. Perform the latter here + * and the former in bl1_main. + * --------------------------------------------- + */ + bl bl1_early_platform_setup + bl bl1_plat_arch_setup + + /* --------------------------------------------- + * Give ourselves a stack allocated in Normal + * -IS-WBWA memory + * --------------------------------------------- + */ + mrs x0, mpidr_el1 + bl platform_set_stack + + /* --------------------------------------------- + * Jump to the main function. Returning from it + * is a terminal error. + * --------------------------------------------- + */ + blr x20 + +cb_init_panic: + b cb_init_panic |